At what level of wear should the drum wall of a crane be scrapped?

[George]

Tower crane drum walls should be scrapped when the wear reaches 10% of the original wall thickness. Below are the specific handling procedures for personal vehicle scrapping: 1. Prepare the required materials for the scrapping procedure: Prepare the "Motor Vehicle Registration Form (Supplementary Form)", "Application Form for Motor Vehicle Suspension, Resumption/De-registration", "Motor Vehicle Registration Certificate" (unless not obtained), and the motor vehicle license. 2. Submit an application to the public security authority: The owner of the vehicle to be scrapped should promptly submit an application to the public security authority and complete the motor vehicle scrapping procedures. On the day of acceptance, the public security authority will issue the "Motor Vehicle Scrapping Certificate" to the owner and instruct them to sell the scrapped vehicle to a recycling company for scrapped vehicles.